Key facts
- Sildenafil is usually taken about an hour before sex.
- Tadalafil's effect can last up to 36 hours.
- How quickly a medicine works varies from person to person.
General reference only. Follow the instructions from your prescriber and the patient information leaflet.
| Medicine | Usually taken | Effect can last |
|---|---|---|
| Sildenafil | About an hour before sex | See leaflet |
| Tadalafil | Before sex, or daily | Up to 36 hours |
How quickly a medicine works can vary. If it doesn't seem to work, don't take more. Speak to your prescriber.